Improvement in coverings for steam boilers, pipes



T. MERBIAM. Coverings for Steam-Builer-s, IPipes, 811e. 'No.rsJn.

Patented Nov. 10,1874.

UNITED STATES PATENT QriiIoEo TRUMAN MERRIAM, OF MILWAUKEE, WISCONSIN.

IMPROVEMENT IN COVERINGS FOR STEAM BOILERS, PIPES, &o.

Specification forming part of Letters Patent No. 156,71 l, dated November 10, 1874 application filed January 10, 1,873.

To all whom it may concern:

Be it known that I, TRUMAN MERRIAM, of the city and county of Milwaukee, in the State of `Wisconsin, have invented certain Improvements in Ooverin gs for Steam Boilers and Pipes, or anything Where it is desirable to prevent the radiation of heat; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawing, in which- Figure l is a sectional view of my invention. Fig. 2 is an end View.

Letter A represents the iron or article to be covered. Letter C represents the cord or rope Wound spirally around the iron. Letter H is the cord Wound straight around the iron. Letter S is the space or dead-air chamber. Letter P is the paperwhich rests on the cord. Letter F is the hair felt. Letter T is the masticrubber covering for the hair felt. Letter D is the clay cement.

To form a dead-air chamber I Wind a cord or small rope spirally or straight about the boiler or pipe, Svc. On the cord I lay tarred roofing-paper, or any substantial paper. This The method of forming a dead-air chamberon steam boilers, pipes, 85e., by means 4of strands of rope Wound spirally or straight about the boiler or pipe, tbc., covered with cement and supporting tarred paper, or any substantial paper, and hair felt or cement, substantially as described.

TRUMAN MERRIAM.

Witnesses Guns. C. RATTINGER, W. P. HUNTINGTON. 

